What are the answers to 7-15 on What is the worlds most expensive college punchline?

7. 9y - 4(y + 5) = 40

y = 12

8. 10 - 3(m - 2) = 8

m = 2â…”

9. 16d - (4 - 5d) = -67

d = -3

10. 7 (6x - 1) + x = 36

x = 1

11. 11 - 2(8 + 3p) = 72

p = 9

12. ¼(5b + 11) = 19

b = 13

13. 2/7(4m - 18) = 12

m = 15

14. 75 = 3(-10t - 3) + 6t

t = 3½

15. -â…š(9 + 2x) = 40

x = -20